Zac The Secret Weapon

Top/Jungler

6300

975

Cell Division

Each time Zac uses an ability on enemies, he sheds a chunk of himself to a nearby location. Zac can move over these chunks to reabsorb them, regaining 4% of his maximum health. Enemies may move over these chunks to destroy them.
Upon taking fatal damage, Zac splits into 4 bloblets that attempt to recombine. Each bloblet has 12% of Zac's maximum health, and 50% of his armor and magic resistance. If any of these bloblets remain after 8 seconds, Zac will revive with 10-50% health depending on the health of the surviving chunks. This effect has a static cooldown and is unaffected by cooldown reduction.

Active:
Active: Zac leaps into the air and begins to bounce on the ground, up to a maximum of 4 bounces. Each bounce deals magic damage to nearby enemies upon impact, knocks them up for 1 second, and slows them by 20% for 1 second. Enemies hit more than once take half damage and are not knocked up.
Zac gains an accelerating movement speed buff (20-50%) and 50% crowd control reduction while bouncing. During this time, Zac can still move and use Unstable Matter, but is unable to activate Stretching Strike or Elastic Slingshot.
No Cost
One Second Knock Up
Slow: 20%
Magic Damage: 140 / 210 / 280
(+0.4 Ability Power)
Cooldown: 350 / 525 / 700 Seconds (+1.0 Ability Power)

+100 Armor
UNIQUE Passive: Upon being hit by a basic attack, reflects magic damage back to the attacker equal to 25% of your bonus Armor plus 15% of the incoming damage.
(Bonus Armor is Armor from Items, Buffs, Runes and Masteries.)
(Reflect damage is calculated based on damage taken before being reduced by Armor.)

Other Stuff on Zac

Void Staff

+80 Ability Power
UNIQUE Passive: +35% Magic Penetration.

Zhonya's Hourglass

+100 Ability Power
+45 Armor
UNIQUE Active - Stasis: Champion becomes invulnerable and untargetable for 2.5 seconds, but is unable to move, attack, cast spells, or use items during this time (90 second cooldown).

NOPE "

Lets Face it Zac do not need this item! WHY?!? Because he has enough slow and Stuns and you would spend your gold for nothing! Trust me i see in lot of guides that they should buy this but on Zac its crap!

Rylai's Crystal Scepter

+400 Health
+100 Ability Power
UNIQUE Passive: Damaging spells and abilities apply a Movement Speed reduction to enemies based on the spell type:
Single Target: 40% reduction for 1.5 seconds.
Area of Effect: 40% reduction for 1 seconds.
Damage over Time or Multi-hit: 20% reduction for 1 seconds.
Summoned Minions: 20% reduction for 1 seconds.
(If a spell fits in more than one category, it uses the weakest slow value.)